Patent No. EP3209387 (titled "Chitosan-Containing Antiperspirant Cosmetic Agents Which Are Free Of Halides And/Or Hydroxy Halides Of Aluminum And/Or Zirconium") was filed by Henkel on Sep 30, 2015. The application was issued on Apr 24, 2019.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| THE PROCTER & GAMBLE | Jan 24, 2020 | ARCH |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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